268 TRANSACTIONS OF ROYAL SCOTTISH ARHORICULl URAL SOCIETY. 



of oleoresin conveyed to the laboratory for examination. The 

 crude resin was distilled with steam, and the amount of turpentine 

 and rosin which it contained determined by the usual methods. 

 Of the various turpentines examined that from the western 

 yellow pine (Arizona) agrees most closely in its composition 

 and properties with ordinary turpentine. The oil from the 

 Californian yellow pine differs more in composition from ordinary 

 turpentine, but it is suggested that both the California and 

 Arizona turpentine could be used in the place of ordinary 

 turpentine. Further tests of their behaviour in actual practice 

 will be necessary before this statement can be accepted. The 

 product from the Pinon pine resembles ordinary turpentine, but 

 has an unpleasant smell, which is not entirely removed by 

 distillation. The volatile oil from the Digger pine does not at 

 all resemble turpentine, but consists largely of a hydrocarbon 

 (Heptane), a normal constituent of petroleum. While it cannot 

 take the place of turpentine, it is suggested that it might be used 

 as a solvent. The yield of crude resin from the sugar and 

 lodgepole pines is so small that their turpentines will hardly 

 become commercial products. 



Alex. Lauder. 



Prices and Supplies in the Timber Trade. 



From the fortieth annual special issue of the Timber Trades 

 Journal we learn that the wood trade was generally of a more 

 remunerative character than had been experienced for several 

 years past, and that the optimistic references to the present 

 year's prospects betoken a confidence in the stability of prices. 



The chief feature of the present moment is the course of the 

 white wood market. The demand for pulp wood is increasing 

 at such a rate that the price of white wood approximately equals 

 that of red wood, and, as the demand will still further increase, 

 white wood must appreciate still more in value in the near 

 future. 



From an article on the " Development of wood pulp pro- 

 duction," we get some insight into the enormous quantity of 

 timber used in the production of pulp in Sweden in 191 1. 



To obtain the 896,650 standards of sawn and planed wood 

 shipped from Sweden in that year about 280,000,000 cubic feet 

 of raw material was required. For the production of the 



